Table. Antigenic analysis of influenza viruses (H5N1) by hemagglutinin inhibition test, 2007*.
| Virus | Clade† | Anti-VNM/1203‡ | Anti-IDN/5 | Anti-CDC357 | Anti-QH/1A | Anti-Anhui/1 |
|---|---|---|---|---|---|---|
| Vietnam/1203/2004 | 1 | 160 | 160 | 40 | 40 | 40 |
| Indonesia/5/2005 | 2.1 | <40 | 640 | 640 | 40 | 80 |
| Indonesia/CDC357/2006 | 2.1 | 40 | 1,280 | 1,280 | 80 | 160 |
| BHG/Qinghai/1A/2005 | 2.2 | 80 | 640 | 320 | 160 | 640 |
| Dk/Laos/3295/2006 | 2.3.4 | 40 | 320 | 80 | 40 | 320 |
| Ck/Kuwait/KISR2/2007 | 2.2 | <40 | 640 | 160 | 320 | <40 |
*BHG, bar-headed goose; Dk, duck; Ck, chicken. Boldface numbers indicate titers to prototype viruses. †Based on the World Health Organization (H5N1) nomenclature system (14). ‡Ferret antisera dilution started at 1:40.